Over the past decade it has become apparent that a class of ‘ bursting pulsars ’ exist with the discovery of PSR J1752+2359 and PSR J1938+2213 .
In these pulsars , a sharp increase in the emission is observed that then tends to systematically drop-off from pulse-to-pulse .
In this paper we describe the discovery of such a relationship in high-sensitivity observations of the young ( characteristic age of 90 , 000 yrs ) 0.33 s pulsar B0611+22 at both 327 MHz and 1400 MHz with the Arecibo radio telescope .
While Nowakowski previously showed that B0611+22 has mode-switching properties , the data presented here show , for the first time , that this pulsar emits bursts with characteristic time-scales of several hundred seconds .
At 327 MHz , the pulsar shows steady behaviour in one emission mode which is enhanced by bursting emission slightly offset in pulse phase from this steady emission .
Contrastingly at 1400 MHz , the two modes appear to behave in a competing operation while still offset in phase .
Using a fluctuation spectrum analysis , we also investigate each mode independently for sub-pulse drifting .
Neither emission mode ( i.e .
during bursts or persistent emission ) shows the presence of the drifting sub-pulse phenomenon .
The bursting phenomena seen here appears to be a hybrid between bursting seen in other pulsars and the bistable profile illumination behaviour reported in two other pulsars by Rankin et al .
Further examples of this cross-frequency behaviour are required , as this phenomenon may be quite common among the pulsar population .